write code in xmap with kimi-k2-0711-preview

[dashjay]

Summary:

AI did a good job on this kind of codes
But kimi-k2-0711-preview made a mistake is that map in golang is unorderd
so the testing function generated will not pass

       136 +      // Test with duplicate key generation (last one wins)
       137 +      m2 := map[int]string{1: "a", 2: "b", 3: "c"}
       138 +      fn2 := func(k int, v string) int {
       139 +        return k % 2 // This will create duplicate keys: 1%2=1, 2%2=0, 3%2=1
       140 +      }
       141 +      result2 := xmap.MapKeys(m2, fn2)
       142 +      // Should have keys 0 and 1, with values from the last occurrence of each key
       143 +      expected2 := map[int]string{0: "b", 1: "c"}
       144 +      assert.Equal(t, expected2, result2)

---

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write a new function like MapValues[K comparable, V1, V2 any] in pkg/xmap/xmap_common.go but name MapKeys[K comparable, V1](in map[K]V1, fn func(K, V1) K)
map[K]V1 which do things like MapValues but on keys, and generate a test in pkg/xmap/xmap_test.go

⏺ I'll implement the MapKeys function and add tests for it. Let me start by examining the existing code to understand the pattern used in MapValues.

⏺ Read(pkg/xmap/xmap_common.go)
⎿  Read 75 lines (ctrl+r to expand)

⏺ Now let me look at the test file to understand the testing pattern:

⏺ Read(pkg/xmap/xmap_test.go)
⎿  Read 114 lines (ctrl+r to expand)

⏺ Now I'll implement the MapKeys function based on the existing MapValues pattern, and add tests for it.

⏺ Update(pkg/xmap/xmap_common.go)

╭───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ Edit file │
│ ╭───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮ │
│ │ pkg/xmap/xmap_common.go │ │
│ │ │ │
│ │ 72 func MapValues[K comparable, V1, V2 any](in map[K]V1, fn func(K, V1) V2) │ │

⏺ Update(pkg/xmap/xmap_common.go)

╭───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮
│ Edit file │
│ ╭───────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────╮ │
│ │ pkg/xmap/xmap_common.go │ │
│ │ │ │
│ │ 72 func MapValues[K comparable, V1, V2 any](in map[K]V1, fn func(K, V1) V2) map[K]V2 { │ │

⏺ Update(pkg/xmap/xmap_common.go)
⎿  Updated pkg/xmap/xmap_common.go with 24 additions
72 func MapValues[K comparable, V1, V2 any](in map[K]V1, fn func(K, V1) V2) map[K]V2 {
73 return xiter.ToMap(xiter.Map2(func(k K, v V1) (K, V2) { return k, fn(k, v) }, xiter.FromMapKeyAndValues(in)))
74 }
75 +
76 + // MapKeys transforms the keys of a map using the provided function while keeping values unchanged.
77 + // This is useful for transforming data structures while preserving the value associations.
78 + //
79 + // Parameters:
80 + //
81 + // in map[K]V1: The input map to transform
82 + // fn func(K, V1) K: A function that takes a key and its corresponding value, and returns a new key
83 + //
84 + // Returns:
85 + //
86 + // map[K]V1: A new map with the same values as the input map but with transformed keys
87 + //
88 + // Example:
89 + //
90 + // m := map[string]int{"a": 1, "b": 2, "c": 3}
91 + // fn := func(k string, v int) string {
92 + // return k + "_key"
93 + // }
94 + // result := MapKeys(m, fn)
95 + // // result will be map[string]int{"a_key": 1, "b_key": 2, "c_key": 3}
96 + func MapKeys[K comparable, V1 any](in map[K]V1, fn func(K, V1) K) map[K]V1 {
97 + return xiter.ToMap(xiter.Map2(func(k K, v V1) (K, V1) { return fn(k, v), v }, xiter.FromMapKeyAndValues(in)))
98 + }

⏺ Now I'll add tests for the new MapKeys function:

⏺ Update(pkg/xmap/xmap_test.go)
⎿  User rejected update to pkg/xmap/xmap_test.go
110 emptyResult := xmap.MapValues(emptyMap, fn)
111 assert.Equal(t, map[string]string{}, emptyResult)
112 })
113 +
114 + t.Run("map keys", func(t *testing.T) {
115 + m := map[string]int{"a": 1, "b": 2, "c": 3}
116 + fn := func(k string, v int) string {
117 + return k + "key"
118 + }
119 + var result = xmap.MapKeys(m, fn)
120 + expected := map[string]int{"a_key": 1, "b_key": 2, "c_key": 3}
121 + assert.Equal(t, expected, result)
122 +
123 + // Test with value usage in transformation
124 + fnWithValue := func(k string, v int) string {
125 + return fmt.Sprintf("%s%d", k, v)
126 + }
127 + resultWithValue := xmap.MapKeys(m, fnWithValue)
128 + expectedWithValue := map[string]int{"a_1": 1, "b_2": 2, "c_3": 3}
129 + assert.Equal(t, expectedWithValue, resultWithValue)
130 +
131 + // Test with empty map
132 + emptyMap := map[string]int{}
133 + emptyResult := xmap.MapKeys(emptyMap, fn)
134 + assert.Equal(t, map[string]int{}, emptyResult)
135 +
136 + // Test with duplicate key generation (last one wins)
137 + m2 := map[int]string{1: "a", 2: "b", 3: "c"}
138 + fn2 := func(k int, v string) int {
139 + return k % 2 // This will create duplicate keys: 1%2=1, 2%2=0, 3%2=1
140 + }
141 + result2 := xmap.MapKeys(m2, fn2)
142 + // Should have keys 0 and 1, with values from the last occurrence of each key
143 + expected2 := map[int]string{0: "b", 1: "c"}
144 + assert.Equal(t, expected2, result2)
145 + })
146 }

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.55%. Comparing base (6cacab3) to head (43a6ccc).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main       #9   +/-   ##
=======================================
  Coverage   99.55%   99.55%           
=======================================
  Files          15       15           
  Lines        1114     1118    +4     
=======================================
+ Hits         1109     1113    +4     
  Misses          3        3           
  Partials        2        2           

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